<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://www.bbc.com/mundo/ultimas_noticias/2013/10/131019_ultnot_somalia_bomba_lp.shtml>
<http://www.bbc.com/mundo/ultimas_noticias/2013/10/131019_ultnot_somalia_bomba_lp.shtml>